56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
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// die.go -- die() and warn()
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//
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// (c) 2016 Sudhi Herle <sudhi@herle.net>
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//
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// Licensing Terms: GPLv2
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//
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// If you need a commercial license for this work, please contact
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// the author.
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//
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// This software does not come with any express or implied
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// warranty; it is provided "as is". No claim is made to its
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// suitability for any purpose.
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package main
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import (
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"fmt"
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"os"
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)
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var atExit []func()
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// Die prints an error message to stderr
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// and exits the program after calling all the registered
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// at-exit functions.
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func Die(f string, v ...interface{}) {
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Warn(f, v...)
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Exit(1)
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}
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// Warn prints an error message to stderr
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func Warn(f string, v ...interface{}) {
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z := fmt.Sprintf("%s: %s", os.Args[0], f)
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s := fmt.Sprintf(z, v...)
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if n := len(s); s[n-1] != '\n' {
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s += "\n"
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}
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os.Stderr.WriteString(s)
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os.Stderr.Sync()
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}
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// AtExit registers a function to be called before the program exits.
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func AtExit(f func()) {
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atExit = append(atExit, f)
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}
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// Exit invokes the registered atexit handlers and exits with the
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// given code.
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func Exit(v int) {
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for _, f := range atExit {
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f()
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}
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os.Exit(v)
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}
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